import type { Application } from "express";
/**
 * Re-exported Express application instance (lazy — built on first access so
 * importing this module has no side effects).
 *
 * @example
 * ```ts
 * import { app } from "katanakit-js/adapters/express";
 * app.get("/custom", (req, res) => res.json({ ok: true }));
 * ```
 */
export declare const app: Application;
/**
 * Get the Express application instance.
 *
 * @example
 * ```ts
 * import { useGetApp } from "katanakit-js/adapters/express";
 * const expressApp = useGetApp();
 * ```
 */
export declare const useGetApp: () => Application;
/**
 * Start the Express HTTP server.
 *
 * @example
 * ```ts
 * import { useStart } from "katanakit-js/adapters/express";
 * useStart(3000, "localhost");
 * ```
 */
export declare const useStart: (port?: number, host?: string) => void;
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